Describe the Brownian motion.

Explanation

Brownian motion is due to the bombardment of suspended particles by molecules of the surrounding fluid.
According to kinetic theory, any particle suspended in a liquid or gas is continuously bombarded from all the directions so that the mean free path is almost negligible. This leads to the motion of the particles in a random and zig-zag manner

Factors affecting Brownian Motion :
(i) Brownian motion increases with increasing temperature.
(ii) Brownian motion decreases with bigger particle size, high viscosity and density of the liquid (or) gas.